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Planning QUESTION #5023

Which concept addresses the relationship between transportation infrastructure and land development?

Land use-transport feedback cycle✔️
Zoning regulations only
Building codes
Environmental impact

Correct Answer Logic:

The land use-transport feedback cycle recognizes that transportation improvements increase accessibility, stimulating development, which generates more travel demand, requiring more infrastructure—a continuous cycle requiring integrated planning to avoid induced demand and sprawl.

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Boilers Mechanical Engineering QUESTION #2459

Question 682

Gear interference occurs when:

The pressure angle exceeds 25°
The addendum circle of one gear extends beyond the tangent points (interference points) on the line of action✔️
The contact ratio exceeds 2.0
The module is less than 1 mm

Correct Answer Logic:

Interference occurs when the dedendum of one gear extends below its base circle. The maximum addendum radius without interference is $r_{a,max}=\sqrt{r_b^2+c^2\sin^2\phi}$.

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Chemistry QUESTION #5551

Question 683

What is the total number of lone pairs of electrons in the $I_3^-$ ion?

9✔️
12
3
6

Correct Answer Logic:

In $I_3^-$: Central iodine has 3 lone pairs, each terminal iodine has 3 lone pairs each. Total lone pairs = 3 (central I) + 3 (terminal I) + 3 (terminal I) = 9 lone pairs. The structure is linear with the central I having 2 bond pairs and 3 lone pairs ($sp^3d$ hybridization).

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Islamic Studies QUESTION #627

Question 684

Who wrote "Al-Farooq"?

Syed Sulaiman Nadvi
Shibli Nomani✔️
Deputy Nazir Ahmed
None of these

Correct Answer Logic:

Shibli Nomani authored this famous biography of Hazrat Umar (رضي الله عنه).

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3011

Question 685

The purpose of a 'Suspending Agent' is to:

Increase the rate of settling
Increase the viscosity of the vehicle✔️
Lower the boiling point
Sterilize the preparation

Correct Answer Logic:

Suspending agents increase viscosity to slow down the sedimentation of solid particles.

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Islamic Studies QUESTION #7703

Question 686

Zakat is NOT due on:

Personal items like clothes and furniture✔️
Cash
Livestock
None of these

Correct Answer Logic:

Zakat is not obligatory on personal items used for daily living, such as clothing, furniture, house, car for personal use, etc. Zakat is due on wealth that is productive or can be productive, such as cash, gold, silver, business inventory, and livestock kept for trade.

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Urdu QUESTION #4466

Question 687

لفظ مہتر کا مونث بتائیں۔ (Tell the feminine form of the word 'Mehtar')

مہترنی✔️
مہترانی
مہتری
ان میں کوئی نہیں۔

Correct Answer Logic:

The standard feminine form of 'Mehtar' (a sweeper or a title) in Urdu grammar is 'Mehtarni' (مہترنی).

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General Science and Ability QUESTION #188

Question 688

Global winds towards western direction are known as:

Trade winds✔️
Western winds
Reynolds wind
None of these

Correct Answer Logic:

Trade winds (easterlies) blow from east to west toward the equator.

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Mathematics QUESTION #4105

Question 689

The absolute maximum value of $f(x,y)=xy-2x$ over the entire triangular region with vertices $(0,0),(4,0),(0,4)$ is:

$0$
$1$✔️
$4$
$8$

Correct Answer Logic:

Boundary analysis: Edge $y=0$: $f=-2x\leq0$. Edge $x=0$: $f=0$. Edge $y=4-x$: $f=-x^2+2x$, max at $x=1$ giving $f=1$. Vertex values: $f(0,0)=0$, $f(4,0)=-8$, $f(0,4)=0$. The absolute maximum is $\boxed{1}$ at $(1,3)$.

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Mathematics QUESTION #4134

Question 690

For $\vec{r} = x\hat{i} + y\hat{j} + z\hat{k}$ and $r = |\vec{r}|$, what is $\nabla r$?

$\vec{r}$
$\frac{\vec{r}}{r}$✔️
$\frac{\vec{r}}{r^2}$
$\hat{r}$

Correct Answer Logic:

$\nabla r = \frac{\partial r}{\partial x}\hat{i} + \frac{\partial r}{\partial y}\hat{j} + \frac{\partial r}{\partial z}\hat{k} = \frac{x}{r}\hat{i} + \frac{y}{r}\hat{j} + \frac{z}{r}\hat{k} = \frac{\vec{r}}{r}$.

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Security Measures to Maintain Law and Order QUESTION #933

Question 691

What does the term 'Access Control' specifically regulate?

Public transportation
Entry and exit of people and vehicles✔️
Flight departure times
Airport revenue

Correct Answer Logic:

Access control ensures that only authorized individuals can enter specific restricted or sensitive zones.

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Journalism / Mass Communication QUESTION #6390

Question 692

The term enculturation is defined in the textbook as the process of passing on culture from one generation to the next. Which of the following scenarios BEST illustrates enculturation rather than acculturation?

A Pakistani engineer working in Germany gradually adopts German work habits and social norms
A British expatriate in Japan learns Japanese etiquette and business customs to function professionally
A Pakistani child raised in Lahore naturally absorbs Urdu language, Islamic values, local food traditions, and family social structures through upbringing✔️
A student consciously studies another culture's communication norms before travelling abroad

Correct Answer Logic:

Enculturation is the natural, passive, lifelong process by which individuals absorb their own culture's values, language, norms, and beliefs — primarily from parents, family, community, and education. It is largely unconscious: the child does not choose to be enculturated; it simply happens through immersion. The Lahore example (Option C) perfectly illustrates this: a Pakistani child does not consciously choose to speak Urdu, observe Islamic practices, eat biryani, or respect elders — these are absorbed as part of growing up in that environment. Acculturation (Options A, B, D), by contrast, involves a conscious, deliberate effort to learn and internalise the norms of a different culture. The textbook notes that acculturation “may take years even to those who command some expertise on communication techniques.” Failure to acculturate leads to ongoing communication problems and possible cultural shock.

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Medicinal Chemistry and Biopharmaceutics QUESTION #3818

Question 693

Why are viscosity-enhancing agents such as methylcellulose added to ophthalmic solutions?

To increase ocular exposure time✔️
To reduce inflammation of the eye by their soothing effect
To suspend soluble drugs
To reduce drop size

Correct Answer Logic:

Methylcellulose and similar agents increase the viscosity of ophthalmic drops, thereby prolonging contact time with the ocular surface and improving drug absorption.

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Chemistry QUESTION #7156

Question 694

Thallium ($Tl$) can exist in both $+1$ and $+3$ oxidation states, whereas Aluminium ($Al$) is typically found only in the $+3$ state. What is the reason for this difference?

Inert pair effect✔️
Diagonal relationship
Lattice effect
Lanthanoid contraction

Correct Answer Logic:

As we move down Group 13, the $ns^2$ electrons become increasingly reluctant to participate in bonding due to poor shielding by $d$ and $f$ electrons. This is known as the Inert Pair Effect. For Thallium, the $+1$ oxidation state is more stable than $+3$, while for lighter elements like Al, the effect is negligible.

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Professional QUESTION #1838

Question 695

Section 12(3) provides the right to show cause before dismissal. However, the proviso lists two exceptions where this right does NOT apply. Which of the following is one of those exceptions?

Where the civil servant has been absent without leave for more than thirty days
Where the civil servant is dismissed on the ground of conduct leading to conviction on a criminal charge✔️
Where the civil servant holds an ad hoc appointment
Where the civil servant is on extended probation

Correct Answer Logic:

Section 12(3) provides two exceptions to the right to show cause: (i) where the civil servant is dismissed on grounds of conduct leading to conviction on a criminal charge; and (ii) where the President or an authorized person is satisfied, for recorded reasons, that in the interest of the security of Pakistan it is not expedient to give such opportunity. Criminal conviction and national security are the two exceptions.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2988

Question 696

How many micrograms ($\mu\text{g}$) are in $0.5\text{ milligrams}$ ($mg$)?

$50\text{ }\mu\text{g}$
$500\text{ }\mu\text{g}$✔️
$5000\text{ }\mu\text{g}$
$0.0005\text{ }\mu\text{g}$

Correct Answer Logic:

$1\text{ mg} = 1000\text{ }\mu\text{g}$, so $0.5\text{ mg} = 500\text{ }\mu\text{g}$.

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Mathematics QUESTION #1325

Question 697

For the ODE $y''-2y'+2y=0$, the general solution using roots $r=1\pm i$ is:

$y=e^x(C_1+C_2 x)$
$y=C_1e^x\cos x+C_2e^x\sin x$✔️
$y=C_1\cos x+C_2\sin x$
$y=e^{-x}(C_1\cos x+C_2\sin x)$

Correct Answer Logic:

For complex roots $r=\alpha\pm\beta i$, the real general solution is $y=e^{\alpha x}(C_1\cos\beta x+C_2\sin\beta x)$. Here $\alpha=1$, $\beta=1$, so $y=e^x(C_1\cos x+C_2\sin x)$.

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Mathematics QUESTION #4088

Question 698

If $\varphi: \mathbb{Z}_6 \to \mathbb{Z}_6$ is a one-to-one (injective) homomorphism, then $\ker(\varphi)$ is:

All of $\mathbb{Z}_6$
$\{0, 2, 4\}$
$\{0, 3\}$
$\{0\}$✔️

Correct Answer Logic:

A group homomorphism is injective if and only if its kernel is trivial (contains only the identity). Since $\varphi$ is one-to-one, $\ker(\varphi) = \{0\}$, the trivial subgroup of $\mathbb{Z}_6$.

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Physics QUESTION #7854

Question 699

Centripetal force for car in circular path is provided by:

Inertia
Mass pull
Engine power
Friction between tyres and road✔️

Correct Answer Logic:

Friction provides the necessary centripetal force.

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Biology QUESTION #4228

Question 700

Ventricular diastole causes:

ventricular contraction
Closure of Atrioventricular valve
Opening of semilunar valve
Closure of semilunar valve✔️

Correct Answer Logic:

During ventricular diastole, semilunar valves close.

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